Building-elevator.



J. E. CARRUTHERS.

BUILDING ELEVATOR. APPLICATION F ILED FEB. I. 1919.

1,299,124. I Patented Apr. 1,1919.

3 SHEETS-SHEET I.

J. E. CARRUTHERS.

BUILDING ELEVATOR.

APPLICATION FILED FEB. 1. 1919.

Patented Apr. 1,1919.

3 SHEETSSHEET 2.

THE Noam: PETERS cav. INOfO-LITMQ. wwmvnm J. E. CARRUTHERS.

BUILDING ELEVATOR.

APPLICATION FILED FEB. I. 1919.

Patented Apr. 1,1919.

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JOI-INE. CARRUTHERS, OE AUBURN, MAINE, ASSIGNOR 0F ONE-HALF T0 WILLIAMA.

PAUL, OF AUBURN, MAINE.

BUILDING-ELEVATOR.

. Specification of Letters Patent.

' Patented Apr. 1, 191a.

, Application filed February 1, 1919. Serial No. 274,504.

To all whom it may concern Be it known that I, JOHN E. CARRUTHnRs,

State of Maine, have invented certain new and useful ImprovementsinBuilding-Elevators, of which the following is a specification. g

My invention relates to improvements in elevators and more particularlyto freight elevators in buildings. Its objects, among others, are toprovide means whereby the elevator in rising and falling opensautomatically the tra doors at the floors of the building and theentrance gate or gates to the elevator.

In the accompanying drawings, Figure 1 is a side view with some partsbroken away of an elevator well and elevator with my improvementsapplied thereto; Fig. 2 is a front view of the same with parts brokenaway and Fig. 3 is a horizontal sectional view taken on line ma2 Fig. 1.y

The same reference characters indicate like parts in the severalfigures.

In the drawings, the elevator is shown in r the position where the trapdoors are open and the condition will be the same at any fioor whetherthe elevator be rising or falling. In said drawings, 1 is the elevatorwell, 2 the building frame. These may be of any convenient constructionand arrangement. The elevator is adapted to be raised or lowered bypower and in any convenient manner. As shown, the power is applied to acable 3 passing over a pulley 4 on the building frame, the cable 3 beingsecured to the top of the elevator. The elevator consists of a platform5 and supporting frame 6, the top of the framecomprising a rectangularband 7. To the bottom of the elevator are attached outwardly extendingwedge-shaped door openers 8 and, at the top of the frame, are attachedsimilar wedge-shaped door openers 9. In the floor between two rooms, areprovided ways 10 in which are positioned horizontally movable trap doors11 adapted, when brought together, to close the floor opening in thewell. These doors on the adjacent edges and on each side are preferablyprovided with anti-friction rolls 12 positioned so that, when theelevator descends or ascends, the wedge-shaped door. openers 8 and 9'engage the anti-friction rolls 12 and force the doors apart to permitthe elevator to pass from floor to floor.

In the elevatorwell frame on the entrance side are vertical grooved ways13 in which is loosely mounted a vertically reciprocating gate 14. Thisgate may be of any convenient style and its vertical edges extend intoand reciprocate in said grooved ways, the width of the gate being lessthan the space between the bottoms of the two grooves, thus runningloosely in 'theways. The gate is raised by acable or belt connection 15between it and the trap doors. This cable 15 passes over a pulley 16 atthe top and attached to the top of the frame by a staple 17 or in anyconvenient way. The cable then'passes down preferably in the groovedways 13 in which the vertical door reciprocates, thence rearwardlyaround a stationary truck 18, thence around a truck 19 attached to theinner door, thence back and attached to the edge of the other door at20. It is noted that the two sides of the elevator door and well andoperating mechanism are substantially duplicates. Thus, it will be seenthat, when the wedge 8 or 9 forces the sliding doors apart, the actionof the cable is to raise the vertical reciprocating door. Now, when theelevator passes above or below the floor, the weight of thereciprocating door is sufficient to return the trap doors together,thus, closing the trap opening in the well as soon as the elevator haspassed in either direction. The

trap doors are mounted on trucks 22 which travel on a track 21. Thereciprocating door is provided at the to with a buffer 23 mounted onrods 24 on the top of the frame and having coil springs 25 upon saidrods between the buffer and the top of the door frame. The frame of theelevator and the frame of the well are provided with a tongue and groovestructure 26 for guiding and steadying the movement of the elevator inthe well.

- I claim:

1. In a device of the character described, an elevator well, avertically movable gate, horizontally movable trap doors, a cableconnecting said gate and doors and an elevator provided withwedge-shaped trap door openers.

2. In a device of the character described, anelevator well, averticallymovable gate, horizontally movable trap doorsprovided;

with anti-friction rolls in their adjacent edges, a cable connectingsaid gate and doors and an elevator provided With Wedgeshaped dooropeners.

3. In a device of the characterdesci 'ibed, an elevator well, verticallygrooved ways in the frame adjacent said well, a vertical gate free tomove in said Ways, horizontally movable trap doors, cables connectingsaid gate and doors and an elevator provided with wedgeshaped trap dooropeners.

l. In a device of the character described, an elevator well, avertically movable gate, horizontally movable trap doors provided withanti-friction rolls in their adjacent edges, a cable connecting saidgate and doors and an elevator provided with Wedge-shaped trap dooropeners adapted to engage said antifriction rolls and open said doors,the

eight of the gate being sufficient to overcome the inertia of the trapdoors and close them after the elevator has passed.

5. In a device of the character described,

an elevator Well, a vertically movable gate, horizontally movable trapdoors, provided with anti-friction rolls in their adjacent passed.

6. In a device of the character described, an elevator well, averticallymovable gate, horizontally movable trap doors, a cableconnecting said gate and doors on each side, one end of the cable beingattached to the gate, an antrfrictionroll carried by the remote trapdoor over which said cable travels and theother endof the cable attachedto the other trap door whereby the rising or falling of the elevatorraises the gate.

In testimony whereof I affix my signature.

JOHN E. GARRUTHERS.

C opiesof this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G. v

